根据对话内容与上下文，在空白处填入适当的句子，使对话意思完整。

A: Hello, 6817502. B: Hello. ______________________________________________________? (1)

A: Sorry, _______________________________________. (2) This is Jim's mother, Mrs Green. Can

    I take a message?

B: That's very kind of you. This is David, Jim's friend. I ask him for some Chinese stamps. He told me

     he had got some last week.

A: OK. I will tell him about it. Would you like him to call you back later?

B: Well, I won't be at home today. My mother is ill, so I must go to the hospital to look after her. Would

     you please ask him to ring me tomorrow morning?

A: Oh, ________________________________________________.(3) I'll let Jim know it. By the way,

     ______________________________________________?(4)

B: Oh. My phone number is 6877242.

A: 6877242, right?

B: Yes, that's right. Thanks a lot.

A: _____________________________________________________________.(5)